At the green light in the control room,I move the left lever to the top and the right leverto the center.The inner ring of the device does not turn. Do I have to wait awhile till it does,or is it supposed to turn right away?Then after I go up the outer stairs to the blockage and back down to the control room,up the red stairs to the right to the end at the control panel.I move the levers but no green button comes on. Whats the problem??? Sorry if I'm a pain. Thanks.